Support thumbnailing images

config.sample.yaml

...ub.com/turt2live/matrix-media-repo/client/r0/thumbnail.go

src/github.com/turt2live/matrix-media-repo/config/config.go

...urt2live/matrix-media-repo/media_handler/media_handler.go

.../turt2live/matrix-media-repo/media_handler/thumbnailer.go

src/github.com/turt2live/matrix-media-repo/media_repo.go

...thub.com/turt2live/matrix-media-repo/storage/filestore.go

...m/turt2live/matrix-media-repo/storage/schema/thumbnail.go

...github.com/turt2live/matrix-media-repo/storage/storage.go

...github.com/turt2live/matrix-media-repo/types/thumbnail.go

src/github.com/turt2live/matrix-media-repo/util/files.go

vendor/manifest